Sparging (chemistry)From Wikipedia, the free encyclopediaJump to: navigation, search In chemistry, sparging, also known as gas flushing in metallurgy, is a technique which involves bubbling a chemically inert gas, such as nitrogen, argon, or helium, through a liquid. This can be used to remove dissolved gases (e.g. oxygen) from the liquid.
Solvents used in high performance liquid chromatography (HPLC) are often sparged with helium gas.[1] In chemical engineering, sparging can also be a method to remove low-boiling liquids from a solution. The low-boiling components tend to evaporate more rapidly, hence they may be removed from the bulk solution containing higher-boiling components. It is an alternative to distillation, and it does not require heat. This technique is also used in environmental chemistry to extract the oil contaminants from subsoil water and the ground. In metallurgy, this process is used to remove dissolved gases from the melt prior to the material being processed.[2] For example, before casting aluminium alloys, argon gas bubbles can be injected in liquid aluminium using a rotary degaser. The resulting argon bubbles will go up to the surface bringing with it a quantity of dissolved hydrogen gas. This degasing treatment reduces the occurrence of hydrogen gas porosity. [edit] References1.^ M. W. Dong (2000). "Precision in HPLC. Mastering the art of HPLC". Today's Chemist at Work (American Chemical Society) 9 (8): 28-32. ISSN 1062-094X. 2.^ Degarmo, E. Paul; Black, J T.; Kohser, Ronald A. (2003). Materials and Processes in Manufacturing (9th ed.). Wiley. p. 284. ISBN 0-471- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sprinkler Academy - C Bilbo Sent: Monday, January 17, 2011 11:55 AM To: FORUM Subject: RE: Air Releases in 2013 I'll give a free admission to one Academy webinar to the first "non-committee member" that can tell me what "sparged" means in relation to this newer product. (hey Brad, think molecular brides) :-) Sincerely, Cecil Bilbo Academy of Fire Sprinkler Technology Parkland College Champaign, IL 217.607.0325 www.sprinkleracademy.com [email protected] OUR STUDENTS SAVE LIVES!! _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
